Malicious PDF — malware analysis report

Static analysis result for SHA-256 385b9bc2dbe9fe23…

MALICIOUS

PDF

39.5 KB Authoring application: LibreOffice
MD5: 4b0ef240a13d86bec76661b1925a6ab2 SHA-1: 198a17fff29901e6563f6fcff182a515f7bc03d8 SHA-256: 385b9bc2dbe9fe235f739a39af9dad7b8a58a43662d43ed2e28dfb15ef508345
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, a common technique for SEO poisoning and phishing. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or traffic redirection intent. The document body, though partially corrupted, contains text related to converting Word documents to PDF, likely a lure to encourage interaction with the embedded malicious links.

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://eliganphotography.com/uploads/1/3/0/6/130603841/462f8a1c7ac8e40.pdf
    • http://videoglyph.org/uploads/1/3/0/3/130323762/0b8f67570.pdf
    • http://easyadobe.org/uploads/1/3/0/4/130488530/9399778.pdf
    • http://tourtalktaste.com/uploads/1/3/0/9/130969539/biboxukugebijov_kopilolifipo_nepag.pdf
    • http://gamefarm.org/uploads/1/3/0/7/130776321/gazamufe-rufalulovimepe-daxupekojizo-jegajiromibi.pdf
    • http://galgositalianos.com/uploads/1/3/0/5/130550741/gebanitususudi.pdf
    • http://asmallundertaking.com/uploads/1/3/0/3/130313044/3fdb2385f.pdf
    • http://www.davrel.com/uploads/1/3/0/5/130550742/daba84bdd70b79.pdf
    • http://www.teambtl.com/uploads/1/3/0/6/130621158/gepafubonalib.pdf
    • http://rimavop.store/uploads/1/3/0/5/130544086/e78c851.pdf
    • http://weatherproofguide.com/uploads/1/3/0/4/130483614/130483614.html#comment+convertir+un+fichier+word+en+pdf+avec+un+mac
    • http://galgositalianos.com/uploads/1/3/0/5/130550741/gebani

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003387.bin
82709c0e416d7f4f8894a9edd74741797cc81902d45ba188dae5f0d20ce5434d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3387 4120 bytes
font_01_sfnt_off00004338.bin
285fcc79e416af6aa25f33892a20892def9fbe0d40f57765761220978e4bf021		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4338 9032 bytes

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